Expired Canadian patentCanada
Protectants for microbial fermentation
CA 2094510 C · Owner: Ben-Bassat, Arie · Inventors: Coddington, Kent D.; Johnson, Donald C.; Ben-Bassat, Arie
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an improved process for the production of microbial cellulose where a cellulose-producing organism is grown under agitated conditions in the presence of a polyacrylamide-containing polymer.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed September 27, 1991 and granted May 19, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 27, 1991
GrantedMay 19, 1998
Term endedSeptember 27, 2011
Patent numberCA 2094510 C
Classification (IPC)C12P19/04 +2 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.